CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2021-33502
High (7.5) in normalize-url project normalize-url. EPSS 1.7% chance of exploitation in the next 30 days. Fixed in normalize-url 4.5.1, 5.3.1, 6.0.1.
The normalize-url package before 4.5.1, 5.x before 5.3.1, and 6.x before 6.0.1 for Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data: URLs.
Severity
- EPSS
- 1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
- CWE
- CWE-1333
- Published
- Modified
- Record from
- the NVD, synced
Affected
- normalize-url_project:normalize-url
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-px4h-xg32-q955 | npm | normalize-url | >=4.3.0 <4.5.1 | 4.5.1 |
| GHSA-px4h-xg32-q955 | npm | normalize-url | >=5.0.0 <5.3.1 | 5.3.1 |
| GHSA-px4h-xg32-q955 | npm | normalize-url | >=6.0.0 <6.0.1 | 6.0.1 |